Yes, reviews should be in the best sense personal reviews of the reviewer for the product. Therefore they have to be subjective and emotional. A completely objective, purely objective review is not possible, is it? It would be more like a data sheet, wouldn't it?

It is also good and sensible for journalists to review things, of course. But it always becomes problematic when such things are not marked as reviews, opinions or comments. But when one pretends to report something and then delivers an opinion article. Therefore, clearly mark what it is, that should be standard anyway.
The different journalistic forms should be clearly named and distinguished from each other: Report, commentary, review, glossary, essay, etc.

Regarding plugin and theme reviews on WordPress.org:
There will certainly be some abuse, and somewhere and somehow a grey area. You can never prevent that 100%. However, the .org team does a lot to prevent that. And they really do a lot.
I also agree with a lot of what the .org team says on the subject: reviews are a kind of feedback, yes. And when I go public with my software "product" as a plugin author, I automatically expose myself to some kind of rating. That is correct. The only question is, what is "allowed" to endure? - Are false claims (= lies), insults and similar things really part of it? No, they don't belong on there. Here also more stuff would have to be tidied up. Not in every case the user/customer is right. I have already read far too many reviews on .org in the last years, where you could and should have intervened and where exactly that didn't happen. Unfortunately, the tendency is more and more to allow users to let off steam and be encouraged to do so, whereas the plugin authors are often left behind. That is unfair and unjust! In the last few months I have read in about every second statement that plugin authors will be removed if they don't want to be offered all that. This is called blackmail. Point.

Which unfortunately is still a huge problem that users use the 1-star reviews to "punish" the plugin author for whatever. Users take the view that it's their only or most effective way to put "pressure" on the plugin author to do anything with it (even if it's just to indulge or troll their own ego). At first glance, I can even understand that. But if you think longer about it, it's just disrespectful and insolent and doesn't belong there.

What these users usually don't know and also don't want to admit that reviews are a very important ranking factor for the search results on WordPress.org, as well as for the listings, e.g. "Popular Plugins". I.e. the "punishment action" of an unsatisfied user can cause quite some problems for a hobby plugin author. Most of the time even permanent problems, because his ranking go down and his reputation suffers. And it can affect anyone, even providers who offer the very best free support you can imagine and already have a super solid plugin product. Nobody is immune from such "punishment or envy actions".

There are not only companies, agencies etc., which release plugins on .org, but also still many thousands hobbyist developers. For these authors, 1-star reviews are total poison, and usually destroy a lot of motivation. Here simply more consideration and mutual understanding and respect is missing.